package cn.lf.android.lawfirm.utils;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Environment;

public class BFileUtil {

	/** 水平方向模糊度 */
	private static float hRadius = 7;
	/** 竖直方向模糊度 */
	private static float vRadius = 7;
	/** 模糊迭代度 */
	private static int iterations = 3;

	/**
	 * 描述：从sd卡中的文件读取到byte[].
	 *
	 * @param path
	 *            sd卡中文件路径
	 * @return byte[]
	 */
	public static byte[] getByteArrayFromSD(String path) {
		byte[] bytes = null;
		ByteArrayOutputStream out = null;
		try {
			File file = new File(path);
			/****** 调用getByteArrayFromSD方法前已经调用过isCanUseSD这里没必要重复调用 *********/
			// SD卡是否存在
			// if(!isCanUseSD()){
			// return null;
			// }
			// 文件是否存在
			if (!file.exists()) {
				return null;
			}

			long fileSize = file.length();
			if (fileSize > Integer.MAX_VALUE) {
				return null;
			}

			FileInputStream in = new FileInputStream(path);
			out = new ByteArrayOutputStream(1024);
			byte[] buffer = new byte[1024];
			int size = 0;
			while ((size = in.read(buffer)) != -1) {
				out.write(buffer, 0, size);
			}
			in.close();
			bytes = out.toByteArray();

		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			if (out != null) {
				try {
					out.close();
				} catch (Exception e) {
				}
			}
		}
		return bytes;
	}

	/**
	 * 描述：将byte数组写入文件.
	 *
	 * @param path
	 *            the path
	 * @param content
	 *            the content
	 * @param create
	 *            the create
	 */
	public static void writeByteArrayToSD(String path, byte[] content,
			boolean create) {

		FileOutputStream fos = null;
		try {
			File file = new File(path);
			/***** 调用writeByteArrayToSD方法前已经调用过isCanUseSD这里没必要重复调用 ********/
			// SD卡是否存在
			// if(!isCanUseSD()){
			// return;
			// }
			// 文件是否存在
			if (!file.exists()) {
				if (create) {
					File parent = file.getParentFile();
					if (!parent.exists()) {
						parent.mkdirs();
						file.createNewFile();
					}
				} else {
					return;
				}
			}
			fos = new FileOutputStream(path);
			fos.write(content);

		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			if (fos != null) {
				try {
					fos.close();
				} catch (Exception e) {
				}
			}
		}
	}

	/**
	 * 描述：将byte数组写入文件.
	 *
	 * @param path
	 *            the path
	 * @param content
	 *            the content
	 * @param create
	 *            the create
	 */
	public static void writeIMageToSD(String path, byte[] content,
			boolean create) {

		FileOutputStream fos = null;
		try {
			File file = new File(path);
//			// SD卡是否存在
//			if (!isCanUseSD()) {
//				return;
//			}
			// 文件是否存在
			if (!file.exists()) {
				if (create) {
					File parent = file.getParentFile();
					if (!parent.exists()) {
						parent.mkdirs();
						// file.createNewFile();
					}
				} else {
					return;
				}
			}
			fos = new FileOutputStream(path);
			BitmapFactory.Options options = new BitmapFactory.Options();
			options.inPreferredConfig = Bitmap.Config.RGB_565;
			Bitmap bitmap = BitmapFactory.decodeByteArray(content, 0,content.length, options);
//			Bitmap boxBlurFilter = BoxBlurFilter(bitmap);
			bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos);
			
			// writeByteArrayToSD(path, bitmap.getNinePatchChunk(), create);
//			bitmap.compress(Bitmap.CompressFormat.JPEG, 15, fos);
			
			// fos.write(content);

		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			if (fos != null) {
				try {
					fos.close();
				} catch (Exception e) {
				}
			}
		}
	}
	
	/**
	 * 描述：SD卡是否能用.
	 *
	 * @return true 可用,false不可用
	 */
	public static boolean isCanUseSD() {
		try {
			return Environment.getExternalStorageState().equals(
					Environment.MEDIA_MOUNTED);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return false;
	}

	/**
	 *
	 高斯模糊
	 */
	public static Bitmap BoxBlurFilter(Bitmap bmp) {
		int width = bmp.getWidth();
		int height = bmp.getHeight();
		int[] inPixels = new int[width * height];
		int[] outPixels = new int[width * height];
		Bitmap bitmap = Bitmap.createBitmap(width, height,
				Bitmap.Config.RGB_565);
		bmp.getPixels(inPixels, 0, width, 0, 0, width, height);
		
		for (int i = 0; i < iterations; i++) {
			blur(inPixels, outPixels, width, height, hRadius);
			blur(outPixels, inPixels, height, width, vRadius);
		}
		blurFractional(inPixels, outPixels, width, height, hRadius);
		blurFractional(outPixels, inPixels, height, width, vRadius);
		bitmap.setPixels(inPixels, 0, width, 0, 0, width, height);
//		Drawable drawable = new BitmapDrawable(bitmap);
//		return drawable;
		
		return bitmap;
	}

	public static void blur(int[] in, int[] out, int width, int height,
			float radius) {
		int widthMinus1 = width - 1;
		int r = (int) radius;
		int tableSize = 2 * r + 1;
		int divide[] = new int[256 * tableSize];

		for (int i = 0; i < 256 * tableSize; i++)
			divide[i] = i / tableSize;

		int inIndex = 0;

		for (int y = 0; y < height; y++) {
			int outIndex = y;
			int ta = 0, tr = 0, tg = 0, tb = 0;

			for (int i = -r; i <= r; i++) {
				int rgb = in[inIndex + clamp(i, 0, width - 1)];
				ta += (rgb >> 24) & 0xff;
				tr += (rgb >> 16) & 0xff;
				tg += (rgb >> 8) & 0xff;
				tb += rgb & 0xff;
			}

			for (int x = 0; x < width; x++) {
				out[outIndex] = (divide[ta] << 24) | (divide[tr] << 16)
						| (divide[tg] << 8) | divide[tb];

				int i1 = x + r + 1;
				if (i1 > widthMinus1)
					i1 = widthMinus1;
				int i2 = x - r;
				if (i2 < 0)
					i2 = 0;
				int rgb1 = in[inIndex + i1];
				int rgb2 = in[inIndex + i2];

				ta += ((rgb1 >> 24) & 0xff) - ((rgb2 >> 24) & 0xff);
				tr += ((rgb1 & 0xff0000) - (rgb2 & 0xff0000)) >> 16;
				tg += ((rgb1 & 0xff00) - (rgb2 & 0xff00)) >> 8;
				tb += (rgb1 & 0xff) - (rgb2 & 0xff);
				outIndex += height;
			}
			inIndex += width;
		}
	}

	public static void blurFractional(int[] in, int[] out, int width,
			int height, float radius) {
		radius -= (int) radius;
		float f = 1.0f / (1 + 2 * radius);
		int inIndex = 0;

		for (int y = 0; y < height; y++) {
			int outIndex = y;

			out[outIndex] = in[0];
			outIndex += height;
			for (int x = 1; x < width - 1; x++) {
				int i = inIndex + x;
				int rgb1 = in[i - 1];
				int rgb2 = in[i];
				int rgb3 = in[i + 1];

				int a1 = (rgb1 >> 24) & 0xff;
				int r1 = (rgb1 >> 16) & 0xff;
				int g1 = (rgb1 >> 8) & 0xff;
				int b1 = rgb1 & 0xff;
				int a2 = (rgb2 >> 24) & 0xff;
				int r2 = (rgb2 >> 16) & 0xff;
				int g2 = (rgb2 >> 8) & 0xff;
				int b2 = rgb2 & 0xff;
				int a3 = (rgb3 >> 24) & 0xff;
				int r3 = (rgb3 >> 16) & 0xff;
				int g3 = (rgb3 >> 8) & 0xff;
				int b3 = rgb3 & 0xff;
				a1 = a2 + (int) ((a1 + a3) * radius);
				r1 = r2 + (int) ((r1 + r3) * radius);
				g1 = g2 + (int) ((g1 + g3) * radius);
				b1 = b2 + (int) ((b1 + b3) * radius);
				a1 *= f;
				r1 *= f;
				g1 *= f;
				b1 *= f;
				out[outIndex] = (a1 << 24) | (r1 << 16) | (g1 << 8) | b1;
				outIndex += height;
			}
			out[outIndex] = in[width - 1];
			inIndex += width;
		}
	}

	public static int clamp(int x, int a, int b) {
		return (x < a) ? a : (x > b) ? b : x;
	}

}
